2.50 mm Cutter Diameter x 12.00 mm Length of Cut Carbide Square End Mill For Exotic High Temp Alloys, 3 Flutes, AlTiN Nano Coated. Optimized for titanium alloys, inconel, nickel alloys, and other high-temperature materials with outstanding performance in difficult-to-machine steels, stainless steels, and tool steels, this variable helix offering of tools features AlTiN Nano coating for superior hardness and heat resistance